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3 years ago

Choose the best estimate for the length of a paperback book.

Mathematics

2 answers:

Sphinxa [80]3 years ago

5 0

Answer:

I think its 14. If not, check other options. Bye!

Step-by-step explanation:

kobusy [5.1K]3 years ago

3 0

I’m thinking it’s B! Sorry if I’m wrong! :)

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You are at a restaurant and the check comes to a total of $63. If you want to leave an 18% tip, how much total money should you

astraxan [27]

Answer:

$$74.3$ <em>is the total amount.</em>

Step-by-step explanation:

The first step in this problem is to figure out how much of a tip was left. To find that out, you need to multiply the percentage by the total of the meal.

$63 * .18 = 11.34$

We know that 11.34 was how much of a tip that was left,

To figure out the total amount that was spent, you would add the total amount and the tip.

$63 + 11.34 = 74.34$

4 0

3 years ago

Determine whether the set of vectors <img src="https://tex.z-dn.net/?f=%20v_%7B1%3D%283%2C2%2C1%29%2C%20v_%7B2%7D%20%3D%28-1%2C-

Korolek [52]

Since each vector is a member of $\mathbb R^3$ , the vectors will span $\mathbb R^3$ if they form a basis for $\mathbb R^3$ , which requires that they be linearly independent of one another.

To show this, you have to establish that the only linear combination of the three vectors $c_1\mathbf v_1+c_2\mathbf v_2+c_3\mathbf v_3$ that gives the zero vector $\mathbf0$ occurs for scalars $c_1=c_2=c_3=0$ .

$c_1\begin{bmatrix}3\\2\\1\end{bmatrix}+c_2\begin{bmatrix}-1\\-2\\-4\end{bmatrix}+c_3\begin{bmatrix}1\\1\\-1\end{bmatrix}=(0,0,0)\iff\begin{bmatrix}3&-1&1\\2&-2&1\\1&-4&-1\end{bmatrix}\begin{bmatrix}c_1\\c_2\\c_3\end{bmatrix}=\begin{bmatrix}0\\0\\0\end{bmatrix}$

Solving this, you'll find that $c_1=c_2=c_3=0$ , so the vectors are indeed linearly independent, thus forming a basis for $\mathbb R^3$ and therefore they must span $\mathbb R^3$ .

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3 years ago

Most plumbing companies charge a fee to come to your house plus a charge per hour of work. The fees and charges for two plumbing

lord [1]

Answer:

Company A: $y=40x+50$

Company B: $y=50x+25$

Step-by-step explanation:

The initial fee is the y-intercept, as that is the cost at x = 0, or the cost before any time has passed. Afterwards, the rate the cost increases is the slope.

Linear equation in slope-intercept form:

$y=mx+b$

where m is the slope and b is the y-intercept.

Company A charges $50 up front and $40 per hour afterwards, so the equation would be:

$y=40x+50$

Company B charges $25 up front and $50 per hour, so:

$y=50x+25$

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2 years ago

Audra is 5 years older than carly. Brenda is 3 years younger than twice carlys age. The sum of of their ages is 26. How old is e

egoroff_w [7]

Audra is 11

Brenda is 9

Carly is 6

5 0

3 years ago

Help plzz grades at my school are do this weekend

finlep [7]

Ummm...you need to either insert an image of your problem, or type it out If you want people to solve it....

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3 years ago

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